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2021-10-30parisc: Define FRAME_ALIGN and PRIV_USER/PRIV_KERNEL in assembly.hHelge Deller1-0/+7
Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc: fix warning in flush_tlb_allSven Schnelle1-2/+2
I've got the following splat after enabling preemption: [ 3.724721] BUG: using __this_cpu_add() in preemptible [00000000] code: swapper/0/1 [ 3.734630] caller is __this_cpu_preempt_check+0x38/0x50 [ 3.740635] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc4-64bit+ #324 [ 3.744605] Hardware name: 9000/785/C8000 [ 3.744605] Backtrace: [ 3.744605] [<00000000401d9d58>] show_stack+0x74/0xb0 [ 3.744605] [<0000000040c27bd4>] dump_stack_lvl+0x10c/0x188 [ 3.744605] [<0000000040c27c84>] dump_stack+0x34/0x48 [ 3.744605] [<0000000040c33438>] check_preemption_disabled+0x178/0x1b0 [ 3.744605] [<0000000040c334f8>] __this_cpu_preempt_check+0x38/0x50 [ 3.744605] [<00000000401d632c>] flush_tlb_all+0x58/0x2e0 [ 3.744605] [<00000000401075c0>] 0x401075c0 [ 3.744605] [<000000004010b8fc>] 0x4010b8fc [ 3.744605] [<00000000401080fc>] 0x401080fc [ 3.744605] [<00000000401d5224>] do_one_initcall+0x128/0x378 [ 3.744605] [<0000000040102de8>] 0x40102de8 [ 3.744605] [<0000000040c33864>] kernel_init+0x60/0x3a8 [ 3.744605] [<00000000401d1020>] ret_from_kernel_thread+0x20/0x28 [ 3.744605] Fix this by moving the __inc_irq_stat() into the locked section. Signed-off-by: Sven Schnelle <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc: disable preemption in send_IPI_allbutself()Sven Schnelle1-1/+3
Otherwise we might not stop all other CPUs. Signed-off-by: Sven Schnelle <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc: fix preempt_count() check in entry.SSven Schnelle1-2/+2
preempt_count in struct thread_info is unsigned int, but the entry.S code used LDREG, which generates a 64 bit load when compiled for 64 bit. Fix this to use an ldw and also change the condition in the compare one line below to only compares 32 bits, although ldw zero extends, and that should work with a 64 bit compare. Signed-off-by: Sven Schnelle <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc: deduplicate code in flush_cache_mm() and flush_cache_range()Sven Schnelle1-51/+30
Parts of both functions are the same, so deduplicate them. No functional change. Signed-off-by: Sven Schnelle <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc: disable preemption during local tlb flushSven Schnelle1-0/+6
flush_cache_mm() and flush_cache_range() fetch %sr3 via mfsp(). If it matches mm->context, they flush caches and the TLB. However, the TLB is cpu-local, so if the code gets preempted shortly after the mfsp(), and later resumed on another CPU, the wrong TLB is flushed. Signed-off-by: Sven Schnelle <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc: Add KFENCE supportHelge Deller3-2/+52
Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc: Switch to ARCH_STACKWALK implementationHelge Deller2-17/+15
It's shorter and kfence currently depends on this stack unwinding implementation. Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc: make parisc_acctyp() available outside of faults.cHelge Deller2-1/+2
When adding kfence support, we need to tell kfence_handle_page_fault() if the interrupted assembler statement is a read or write operation. Signed-off-by: Helge Deller <[email protected]>
2021-10-30parisc/unwind: use copy_from_kernel_nofault()Sven Schnelle1-1/+2
I have no idea why get_user() is used there, but we're unwinding the kernel stack, so we should use copy_from_kernel_nofault(). Signed-off-by: Sven Schnelle <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2021-10-30locking: Remove spin_lock_flags() etcArnd Bergmann1-15/+0
parisc, ia64 and powerpc32 are the only remaining architectures that provide custom arch_{spin,read,write}_lock_flags() functions, which are meant to re-enable interrupts while waiting for a spinlock. However, none of these can actually run into this codepath, because it is only called on architectures without CONFIG_GENERIC_LOCKBREAK, or when CONFIG_DEBUG_LOCK_ALLOC is set without CONFIG_LOCKDEP, and none of those combinations are possible on the three architectures. Going back in the git history, it appears that arch/mn10300 may have been able to run into this code path, but there is a good chance that it never worked. On the architectures that still exist, it was already impossible to hit back in 2008 after the introduction of CONFIG_GENERIC_LOCKBREAK, and possibly earlier. As this is all dead code, just remove it and the helper functions built around it. For arch/ia64, the inline asm could be cleaned up, but it seems safer to leave it untouched. Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Helge Deller <[email protected]> # parisc Link: https://lore.kernel.org/r/[email protected]
2021-10-27ftrace: disable preemption when recursion locked王贇1-2/+0
As the documentation explained, ftrace_test_recursion_trylock() and ftrace_test_recursion_unlock() were supposed to disable and enable preemption properly, however currently this work is done outside of the function, which could be missing by mistake. And since the internal using of trace_test_and_set_recursion() and trace_clear_recursion() also require preemption disabled, we can just merge the logical. This patch will make sure the preemption has been disabled when trace_test_and_set_recursion() return bit >= 0, and trace_clear_recursion() will enable the preemption if previously enabled. Link: https://lkml.kernel.org/r/[email protected] CC: Petr Mladek <[email protected]> Cc: Guo Ren <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Helge Deller <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Albert Ou <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Jiri Kosina <[email protected]> Cc: Joe Lawrence <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Nicholas Piggin <[email protected]> Cc: Jisheng Zhang <[email protected]> CC: Steven Rostedt <[email protected]> CC: Miroslav Benes <[email protected]> Reported-by: Abaci <[email protected]> Suggested-by: Peter Zijlstra <[email protected]> Signed-off-by: Michael Wang <[email protected]> [ Removed extra line in comment - SDR ] Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-10-24kbuild: use more subdir- for visiting subdirectories while cleaningMasahiro Yamada2-6/+4
Documentation/kbuild/makefiles.rst suggests to use "archclean" for cleaning arch/$(SRCARCH)/boot/, but it is not a hard requirement. Since commit d92cc4d51643 ("kbuild: require all architectures to have arch/$(SRCARCH)/Kbuild"), we can use the "subdir- += boot" trick for all architectures. This can take advantage of the parallel option (-j) for "make clean". I also cleaned up the comments in arch/$(SRCARCH)/Makefile. The "archdep" target no longer exists. Signed-off-by: Masahiro Yamada <[email protected]> Reviewed-by: Kees Cook <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Acked-by: Michael Ellerman <[email protected]> (powerpc)
2021-10-18mm: Add flush_dcache_folio()Matthew Wilcox (Oracle)1-1/+2
This is a default implementation which calls flush_dcache_page() on each page in the folio. If architectures can do better, they should implement their own version of it. Signed-off-by: Matthew Wilcox (Oracle) <[email protected]> Acked-by: Vlastimil Babka <[email protected]>
2021-10-15sched: Add wrapper for get_wchan() to keep task blockedKees Cook2-5/+2
Having a stable wchan means the process must be blocked and for it to stay that way while performing stack unwinding. Suggested-by: Peter Zijlstra <[email protected]> Signed-off-by: Kees Cook <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Acked-by: Russell King (Oracle) <[email protected]> [arm] Tested-by: Mark Rutland <[email protected]> [arm64] Link: https://lkml.kernel.org/r/[email protected]
2021-10-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-2/+0
tools/testing/selftests/net/ioam6.sh 7b1700e009cc ("selftests: net: modify IOAM tests for undef bits") bf77b1400a56 ("selftests: net: Test for the IOAM encapsulation with IPv6") Signed-off-by: Jakub Kicinski <[email protected]>
2021-10-08ftrace: Cleanup ftrace_dyn_arch_init()Weizhao Ouyang1-5/+0
Most of ARCHs use empty ftrace_dyn_arch_init(), introduce a weak common ftrace_dyn_arch_init() to cleanup them. Link: https://lkml.kernel.org/r/[email protected] Acked-by: Heiko Carstens <[email protected]> (s390) Acked-by: Helge Deller <[email protected]> (parisc) Signed-off-by: Weizhao Ouyang <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-10-08Merge tag 'asm-generic-fixes-5.15' of ↵Linus Torvalds1-2/+0
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic fixes from Arnd Bergmann: "There is one build fix for Arm platforms that ended up impacting most architectures because of the way the drivers/firmware Kconfig file is wired up: The CONFIG_QCOM_SCM dependency have caused a number of randconfig regressions over time, and some still remain in v5.15-rc4. The fix we agreed on in the end is to make this symbol selected by any driver using it, and then building it even for non-Arm platforms with CONFIG_COMPILE_TEST. To make this work on all architectures, the drivers/firmware/Kconfig file needs to be included for all architectures to make the symbol itself visible. In a separate discussion, we found that a sound driver patch that is pending for v5.16 needs the same change to include this Kconfig file, so the easiest solution seems to have my Kconfig rework included in v5.15. Finally, the branch also includes a small unrelated build fix for NOMMU architectures" Link: https://lore.kernel.org/all/[email protected]/ Link: https://lore.kernel.org/all/[email protected]/ Link: https://lore.kernel.org/all/[email protected]/ * tag 'asm-generic-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: asm-generic/io.h: give stub iounmap() on !MMU same prototype as elsewhere qcom_scm: hide Kconfig symbol firmware: include drivers/firmware/Kconfig unconditionally
2021-10-07firmware: include drivers/firmware/Kconfig unconditionallyArnd Bergmann1-2/+0
Compile-testing drivers that require access to a firmware layer fails when that firmware symbol is unavailable. This happened twice this week: - My proposed to change to rework the QCOM_SCM firmware symbol broke on ppc64 and others. - The cs_dsp firmware patch added device specific firmware loader into drivers/firmware, which broke on the same set of architectures. We should probably do the same thing for other subsystems as well, but fix this one first as this is a dependency for other patches getting merged. Reviewed-by: Bjorn Andersson <[email protected]> Reviewed-by: Charles Keepax <[email protected]> Acked-by: Will Deacon <[email protected]> Acked-by: Bjorn Andersson <[email protected]> Cc: Mark Brown <[email protected]> Cc: Liam Girdwood <[email protected]> Cc: Charles Keepax <[email protected]> Cc: Simon Trimmer <[email protected]> Cc: Michael Ellerman <[email protected]> Reviewed-by: Mark Brown <[email protected]> Signed-off-by: Arnd Bergmann <[email protected]>
2021-10-01audit: add support for the openat2 syscallRichard Guy Briggs2-0/+4
The openat2(2) syscall was added in kernel v5.6 with commit fddb5d430ad9 ("open: introduce openat2(2) syscall"). Add the openat2(2) syscall to the audit syscall classifier. Link: https://github.com/linux-audit/audit-kernel/issues/67 Link: https://lore.kernel.org/r/f5f1a4d8699613f8c02ce762807228c841c2e26f.1621363275.git.rgb@redhat.com Signed-off-by: Richard Guy Briggs <[email protected]> Acked-by: Christian Brauner <[email protected]> [PM: merge fuzz due to previous header rename, commit line wraps] Signed-off-by: Paul Moore <[email protected]>
2021-10-01audit: replace magic audit syscall class numbers with macrosRichard Guy Briggs2-8/+9
Replace audit syscall class magic numbers with macros. This required putting the macros into new header file include/linux/audit_arch.h since the syscall macros were included for both 64 bit and 32 bit in any compat code, causing redefinition warnings. Link: https://lore.kernel.org/r/2300b1083a32aade7ae7efb95826e8f3f260b1df.1621363275.git.rgb@redhat.com Signed-off-by: Richard Guy Briggs <[email protected]> Acked-by: Christian Brauner <[email protected]> [PM: renamed header to audit_arch.h after consulting with Richard] Signed-off-by: Paul Moore <[email protected]>
2021-10-01fix up for "net: add new socket option SO_RESERVE_MEM"Stephen Rothwell1-0/+2
Some architectures do not include uapi/asm/socket.h Fixes: 2bb2f5fb21b0 ("net: add new socket option SO_RESERVE_MEM") Signed-off-by: Stephen Rothwell <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-09-30kprobes: treewide: Make it harder to refer kretprobe_trampoline directlyMasami Hiramatsu1-2/+2
Since now there is kretprobe_trampoline_addr() for referring the address of kretprobe trampoline code, we don't need to access kretprobe_trampoline directly. Make it harder to refer by renaming it to __kretprobe_trampoline(). Link: https://lkml.kernel.org/r/163163045446.489837.14510577516938803097.stgit@devnote2 Suggested-by: Ingo Molnar <[email protected]> Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-09-30kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler()Masami Hiramatsu1-2/+2
The __kretprobe_trampoline_handler() callback, called from low level arch kprobes methods, has the 'trampoline_address' parameter, which is entirely superfluous as it basically just replicates: dereference_kernel_function_descriptor(kretprobe_trampoline) In fact we had bugs in arch code where it wasn't replicated correctly. So remove this superfluous parameter and use kretprobe_trampoline_addr() instead. Link: https://lkml.kernel.org/r/163163044546.489837.13505751885476015002.stgit@devnote2 Signed-off-by: Masami Hiramatsu <[email protected]> Tested-by: Andrii Nakryiko <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-09-19parisc: Declare pci_iounmap() parisc version only when CONFIG_PCI enabledHelge Deller1-1/+3
Linus noticed odd declaration rules for pci_iounmap() in iomap.h and pci_iomap.h, where it dependend on either NO_GENERIC_PCI_IOPORT_MAP or GENERIC_IOMAP when CONFIG_PCI was disabled. Testing on parisc seems to indicate that we need pci_iounmap() only when CONFIG_PCI is enabled, so the declaration of pci_iounmap() can be moved cleanly into pci_iomap.h in sync with the declarations of pci_iomap(). Link: https://lore.kernel.org/all/CAHk-=wjRrh98pZoQ+AzfWmsTZacWxTJKXZ9eKU2X_0+jM=O8nw@mail.gmail.com/ Signed-off-by: Helge Deller <[email protected]> Suggested-by: Linus Torvalds <[email protected]> Fixes: 97a29d59fc22 ("[PARISC] fix compile break caused by iomap: make IOPORT/PCI mapping functions conditional") Cc: Arnd Bergmann <[email protected]> Cc: Guenter Roeck <[email protected]> Cc: Ulrich Teichert <[email protected]> Cc: James Bottomley <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2021-09-16parisc: Use absolute_pointer() to define PAGE0Helge Deller1-1/+1
Use absolute_pointer() wrapper for PAGE0 to avoid this compiler warning: arch/parisc/kernel/setup.c: In function 'start_parisc': error: '__builtin_memcmp_eq' specified bound 8 exceeds source size 0 Signed-off-by: Helge Deller <[email protected]> Co-Developed-by: Guenter Roeck <[email protected]> Suggested-by: Linus Torvalds <[email protected]>
2021-09-09parisc: Implement __get/put_kernel_nofault()Helge Deller6-86/+62
Remove CONFIG_SET_FS from parisc, so we need to add __get_kernel_nofault() and __put_kernel_nofault(), define HAVE_GET_KERNEL_NOFAULT and remove set_fs(), get_fs(), load_sr2(), thread_info->addr_limit, KERNEL_DS and USER_DS. The nice side-effect of this patch is that we now can directly access userspace via sr3 without the need to use a temporary sr2 which is either copied from sr3 or set to zero (for kernel space). Signed-off-by: Helge Deller <[email protected]> Suggested-by: Arnd Bergmann <[email protected]>
2021-09-09parisc: Mark sched_clock unstable only if clocks are not syncronizedHelge Deller2-6/+3
We check at runtime if the cr16 clocks are stable across CPUs. Only mark the sched_clock unstable by calling clear_sched_clock_stable() if we know that we run on a system which isn't syncronized across CPUs. Signed-off-by: Helge Deller <[email protected]>
2021-09-09parisc: Reduce sigreturn trampoline to 3 instructionsHelge Deller3-9/+8
We can move the INSN_LDI_R20 instruction into the branch delay slot. Signed-off-by: Helge Deller <[email protected]>
2021-09-09parisc: Check user signal stack trampoline is inside TASK_SIZEHelge Deller1-7/+10
Add some additional checks to ensure the signal stack is inside userspace bounds. Signed-off-by: Helge Deller <[email protected]>
2021-09-09parisc: Drop useless debug info and comments from signal.cHelge Deller1-15/+0
Signed-off-by: Helge Deller <[email protected]>
2021-09-09parisc: Drop strnlen_user() in favour of generic versionHelge Deller4-38/+1
As suggested by Arnd Bergmann, drop the parisc version of strnlen_user() and switch to the generic version. Suggested-by: Arnd Bergmann <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2021-09-09parisc: Add missing FORCE prerequisite in MakefileHelge Deller1-9/+9
Signed-off-by: Helge Deller <[email protected]>
2021-09-08arch: remove compat_alloc_user_spaceArnd Bergmann3-17/+0
All users of compat_alloc_user_space() and copy_in_user() have been removed from the kernel, only a few functions in sparc remain that can be changed to calling arch_copy_in_user() instead. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Arnd Bergmann <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Cc: Al Viro <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Eric Biederman <[email protected]> Cc: Feng Tang <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Helge Deller <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2021-09-08compat: remove some compat entry pointsArnd Bergmann1-4/+4
These are all handled correctly when calling the native system call entry point, so remove the special cases. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Arnd Bergmann <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Cc: Al Viro <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Eric Biederman <[email protected]> Cc: Feng Tang <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Helge Deller <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2021-09-08Merge branch 'akpm' (patches from Andrew)Linus Torvalds2-5/+0
Merge more updates from Andrew Morton: "147 patches, based on 7d2a07b769330c34b4deabeed939325c77a7ec2f. Subsystems affected by this patch series: mm (memory-hotplug, rmap, ioremap, highmem, cleanups, secretmem, kfence, damon, and vmscan), alpha, percpu, procfs, misc, core-kernel, MAINTAINERS, lib, checkpatch, epoll, init, nilfs2, coredump, fork, pids, criu, kconfig, selftests, ipc, and scripts" * emailed patches from Andrew Morton <[email protected]>: (94 commits) scripts: check_extable: fix typo in user error message mm/workingset: correct kernel-doc notations ipc: replace costly bailout check in sysvipc_find_ipc() selftests/memfd: remove unused variable Kconfig.debug: drop selecting non-existing HARDLOCKUP_DETECTOR_ARCH configs: remove the obsolete CONFIG_INPUT_POLLDEV prctl: allow to setup brk for et_dyn executables pid: cleanup the stale comment mentioning pidmap_init(). kernel/fork.c: unexport get_{mm,task}_exe_file coredump: fix memleak in dump_vma_snapshot() fs/coredump.c: log if a core dump is aborted due to changed file permissions nilfs2: use refcount_dec_and_lock() to fix potential UAF nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group nilfs2: fix NULL pointer in nilfs_##name##_attr_release nilfs2: fix memory leak in nilfs_sysfs_create_device_group trap: cleanup trap_init() init: move usermodehelper_enable() to populate_rootfs() ...
2021-09-08configs: remove the obsolete CONFIG_INPUT_POLLDEVZenghui Yu1-1/+0
This CONFIG option was removed in commit 278b13ce3a89 ("Input: remove input_polled_dev implementation") so there's no point to keep it in defconfigs any longer. Get rid of the leftover for all arches. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Zenghui Yu <[email protected]> Cc: Dmitry Torokhov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2021-09-08trap: cleanup trap_init()Kefeng Wang1-4/+0
There are some empty trap_init() definitions in different ARCHs, Introduce a new weak trap_init() function to clean them up. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Kefeng Wang <[email protected]> Acked-by: Russell King (Oracle) <[email protected]> [arm32] Acked-by: Vineet Gupta [arc] Acked-by: Michael Ellerman <[email protected]> [powerpc] Cc: Yoshinori Sato <[email protected]> Cc: Ley Foon Tan <[email protected]> Cc: Jonas Bonn <[email protected]> Cc: Stefan Kristiansson <[email protected]> Cc: Stafford Horne <[email protected]> Cc: James E.J. Bottomley <[email protected]> Cc: Helge Deller <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Anton Ivanov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2021-09-05Merge tag 'trace-v5.15' of ↵Linus Torvalds2-3/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: - simplify the Kconfig use of FTRACE and TRACE_IRQFLAGS_SUPPORT - bootconfig can now start histograms - bootconfig supports group/all enabling - histograms now can put values in linear size buckets - execnames can be passed to synthetic events - introduce "event probes" that attach to other events and can retrieve data from pointers of fields, or record fields as different types (a pointer to a string as a string instead of just a hex number) - various fixes and clean ups * tag 'trace-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (35 commits) tracing/doc: Fix table format in histogram code selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes selftests/ftrace: Add selftest for testing eprobe events on synthetic events selftests/ftrace: Add test case to test adding and removing of event probe selftests/ftrace: Fix requirement check of README file selftests/ftrace: Add clear_dynamic_events() to test cases tracing: Add a probe that attaches to trace events tracing/probes: Reject events which have the same name of existing one tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs tracing/probe: Change traceprobe_set_print_fmt() to take a type tracing/probes: Use struct_size() instead of defining custom macros tracing/probes: Allow for dot delimiter as well as slash for system names tracing/probe: Have traceprobe_parse_probe_arg() take a const arg tracing: Have dynamic events have a ref counter tracing: Add DYNAMIC flag for dynamic events tracing: Replace deprecated CPU-hotplug functions. MAINTAINERS: Add an entry for os noise/latency tracepoint: Fix kerneldoc comments bootconfig/tracing/ktest: Update ktest example for boot-time tracing tools/bootconfig: Use per-group/all enable option in ftrace2bconf script ...
2021-09-03Merge tag 'kbuild-v5.15' of ↵Linus Torvalds2-4/+1
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Add -s option (strict mode) to merge_config.sh to make it fail when any symbol is redefined. - Show a warning if a different compiler is used for building external modules. - Infer --target from ARCH for CC=clang to let you cross-compile the kernel without CROSS_COMPILE. - Make the integrated assembler default (LLVM_IAS=1) for CC=clang. - Add <linux/stdarg.h> to the kernel source instead of borrowing <stdarg.h> from the compiler. - Add Nick Desaulniers as a Kbuild reviewer. - Drop stale cc-option tests. - Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG to handle symbols in inline assembly. - Show a warning if 'FORCE' is missing for if_changed rules. - Various cleanups * tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits) kbuild: redo fake deps at include/ksym/*.h kbuild: clean up objtool_args slightly modpost: get the *.mod file path more simply checkkconfigsymbols.py: Fix the '--ignore' option kbuild: merge vmlinux_link() between ARCH=um and other architectures kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh kbuild: merge vmlinux_link() between the ordinary link and Clang LTO kbuild: remove stale *.symversions kbuild: remove unused quiet_cmd_update_lto_symversions gen_compile_commands: extract compiler command from a series of commands x86: remove cc-option-yn test for -mtune= arc: replace cc-option-yn uses with cc-option s390: replace cc-option-yn uses with cc-option ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild sparc: move the install rule to arch/sparc/Makefile security: remove unneeded subdir-$(CONFIG_...) kbuild: sh: remove unused install script kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y kbuild: Switch to 'f' variants of integrated assembler flag kbuild: Shuffle blank line to improve comment meaning ...
2021-09-03Merge tag 'for-5.15/parisc-2' of ↵Linus Torvalds2-69/+1
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc architecture fixes from Helge Deller: "Fix an unaligned-access crash in the bootloader and drop asm/swab.h" * tag 'for-5.15/parisc-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Fix unaligned-access crash in bootloader parisc: Drop __arch_swab16(), arch_swab24(), _arch_swab32() and __arch_swab64() functions
2021-09-03Merge branch 'akpm' (patches from Andrew)Linus Torvalds3-8/+5
Merge misc updates from Andrew Morton: "173 patches. Subsystems affected by this series: ia64, ocfs2, block, and mm (debug, pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap, bootmem, sparsemem, vmalloc, kasan, pagealloc, memory-failure, hugetlb, userfaultfd, vmscan, compaction, mempolicy, memblock, oom-kill, migration, ksm, percpu, vmstat, and madvise)" * emailed patches from Andrew Morton <[email protected]>: (173 commits) mm/madvise: add MADV_WILLNEED to process_madvise() mm/vmstat: remove unneeded return value mm/vmstat: simplify the array size calculation mm/vmstat: correct some wrong comments mm/percpu,c: remove obsolete comments of pcpu_chunk_populated() selftests: vm: add COW time test for KSM pages selftests: vm: add KSM merging time test mm: KSM: fix data type selftests: vm: add KSM merging across nodes test selftests: vm: add KSM zero page merging test selftests: vm: add KSM unmerge test selftests: vm: add KSM merge test mm/migrate: correct kernel-doc notation mm: wire up syscall process_mrelease mm: introduce process_mrelease system call memblock: make memblock_find_in_range method private mm/mempolicy.c: use in_task() in mempolicy_slab_node() mm/mempolicy: unify the create() func for bind/interleave/prefer-many policies mm/mempolicy: advertise new MPOL_PREFERRED_MANY mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY ...
2021-09-03mm: wire up syscall process_mreleaseSuren Baghdasaryan1-0/+2
Split off from prev patch in the series that implements the syscall. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Suren Baghdasaryan <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Christian Brauner <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: David Rientjes <[email protected]> Cc: Florian Weimer <[email protected]> Cc: Jan Engelhardt <[email protected]> Cc: Jann Horn <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Matthew Wilcox (Oracle) <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Roman Gushchin <[email protected]> Cc: Shakeel Butt <[email protected]> Cc: Tim Murray <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2021-09-03mm: remove flush_kernel_dcache_pageChristoph Hellwig2-8/+3
flush_kernel_dcache_page is a rather confusing interface that implements a subset of flush_dcache_page by not being able to properly handle page cache mapped pages. The only callers left are in the exec code as all other previous callers were incorrect as they could have dealt with page cache pages. Replace the calls to flush_kernel_dcache_page with calls to flush_dcache_page, which for all architectures does either exactly the same thing, can contains one or more of the following: 1) an optimization to defer the cache flush for page cache pages not mapped into userspace 2) additional flushing for mapped page cache pages if cache aliases are possible Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Linus Torvalds <[email protected]> Reviewed-by: Ira Weiny <[email protected]> Cc: Alex Shi <[email protected]> Cc: Geoff Levand <[email protected]> Cc: Greentime Hu <[email protected]> Cc: Guo Ren <[email protected]> Cc: Helge Deller <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Nick Hu <[email protected]> Cc: Paul Cercueil <[email protected]> Cc: Rich Felker <[email protected]> Cc: Russell King <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: Ulf Hansson <[email protected]> Cc: Vincent Chen <[email protected]> Cc: Yoshinori Sato <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2021-09-03parisc: Fix unaligned-access crash in bootloaderHelge Deller1-1/+1
Kernel v5.14 has various changes to optimize unaligned memory accesses, e.g. commit 0652035a5794 ("asm-generic: unaligned: remove byteshift helpers"). Those changes triggered an unalignment-exception and thus crashed the bootloader on parisc because the unaligned "output_len" variable now suddenly was read word-wise while it was read byte-wise in the past. Fix this issue by declaring the external output_len variable as char which then forces the compiler to generate byte-accesses. Signed-off-by: Helge Deller <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: John David Anglin <[email protected]> Bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102162 Fixes: 8c031ba63f8f ("parisc: Unbreak bootloader due to gcc-7 optimizations") Fixes: 0652035a5794 ("asm-generic: unaligned: remove byteshift helpers") Cc: <[email protected]> # v5.14+
2021-09-02parisc: Drop __arch_swab16(), arch_swab24(), _arch_swab32() and ↵Helge Deller1-68/+0
__arch_swab64() functions No need to keep those as inline assembly functions, the compiler now generates the same or even better optimized code. Signed-off-by: Helge Deller <[email protected]>
2021-09-02Merge tag 'for-5.15/parisc' of ↵Linus Torvalds11-89/+74
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc architecture updates from Helge Deller: - Fix a kernel crash when a signal is delivered to bad userspace stack - Fix fall-through warnings in math-emu code - Increase size of gcc stack frame check - Switch coding from 'pci_' to 'dma_' API - Make struct parisc_driver::remove() return void - Some parisc related Makefile changes - Minor cleanups, e.g. change to octal permissions, fix macro collisions, fix PMD_ORDER collision, replace spaces with tabs * tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: math-emu: Fix fall-through warnings parisc: fix crash with signals and alloca parisc: Fix compile failure when building 64-bit kernel natively parisc: ccio-dma.c: Added tab instead of spaces parisc/parport_gsc: switch from 'pci_' to 'dma_' API parisc: move core-y in arch/parisc/Makefile to arch/parisc/Kbuild parisc: switch from 'pci_' to 'dma_' API parisc: Make struct parisc_driver::remove() return void parisc: remove unused arch/parisc/boot/install.sh and its phony target parisc: Rename PMD_ORDER to PMD_TABLE_ORDER parisc: math-emu: Avoid "fmt" macro collision parisc: Increase size of gcc stack frame check parisc: Replace symbolic permissions with octal permissions
2021-09-01Merge tag 'asm-generic-5.15' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic updates from Arnd Bergmann: "The main content for 5.15 is a series that cleans up the handling of strncpy_from_user() and strnlen_user(), removing a lot of slightly incorrect versions of these in favor of the lib/strn*.c helpers that implement these correctly and more efficiently. The only architectures that retain a private version now are mips, ia64, um and parisc. I had offered to convert those at all, but Thomas Bogendoerfer wanted to keep the mips version for the moment until he had a chance to do regression testing. The branch also contains two patches for bitops and for ffs()" * tag 'asm-generic-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: bitops/non-atomic: make @nr unsigned to avoid any DIV asm-generic: ffs: Drop bogus reference to ffz location asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols asm-generic: remove extra strn{cpy_from,len}_user declarations asm-generic: uaccess: remove inline strncpy_from_user/strnlen_user s390: use generic strncpy/strnlen from_user microblaze: use generic strncpy/strnlen from_user csky: use generic strncpy/strnlen from_user arc: use generic strncpy/strnlen from_user hexagon: use generic strncpy/strnlen from_user h8300: remove stale strncpy_from_user asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user
2021-09-01Merge branch 'exit-cleanups-for-v5.15' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull exit cleanups from Eric Biederman: "In preparation of doing something about PTRACE_EVENT_EXIT I have started cleaning up various pieces of code related to do_exit. Most of that code I did not manage to get tested and reviewed before the merge window opened but a handful of very useful cleanups are ready to be merged. The first change is simply the removal of the bdflush system call. The code has now been disabled long enough that even the oldest userspace working userspace setups anyone can find to test are fine with the bdflush system call being removed. Changing m68k fsp040_die to use force_sigsegv(SIGSEGV) instead of calling do_exit directly is interesting only in that it is nearly the most difficult of the incorrect uses of do_exit to remove. The change to the seccomp code to simply send a signal instead of calling do_coredump directly is a very nice little cleanup made possible by realizing the existing signal sending helpers were missing a little bit of functionality that is easy to provide" * 'exit-cleanups-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: signal/seccomp: Dump core when there is only one live thread signal/seccomp: Refactor seccomp signal and coredump generation signal/m68k: Use force_sigsegv(SIGSEGV) in fpsp040_die exit/bdflush: Remove the deprecated bdflush system call
2021-09-01parisc: math-emu: Fix fall-through warningsHelge Deller1-3/+53
Fix lots of fallthrough warnings, e.g.: arch/parisc/math-emu/fpudispatch.c:323:33: warning: this statement may fall through [-Wimplicit-fallthrough=] Signed-off-by: Helge Deller <[email protected]>